CN102349217A - Device for axial tensioning of a stator coil of an electrical machine - Google Patents

Abstract

Translated fromChinese

本发明公开了一种电机定子绕组的轴向压紧装置，所述电机特别是发电站的发电机，其中所述绕组具有多个绕线棒，其端部沿轴向穿出定子芯部(2)，并且其端部形成在定子芯部(2)的至少一个轴向端面(3)处变宽的端部绕组。所述轴向压紧装置具有多个绕组支撑件(5)，其相对于所述定子芯部的端面上的端部绕组沿周分散地布置，沿轴向被支撑在所述定子芯部(2)的端面(3)上，并且与所述端部绕组大致成直角。并且，所述绕组支撑件(5)通过至少一个轴向作用的挤压弹簧装置(6)沿轴向被支撑在定子芯部(2)的一个端面(3)上，以用于对绕组进行轴向压紧，同时重新调整装置(7)设置有用于挤压弹簧装置的可轴向调整的接触表面(8)。

The invention discloses an axial compression device for a stator winding of a motor, especially a generator of a power station, wherein the winding has a plurality of winding rods, the ends of which pass through the stator core in the axial direction ( 2), and whose ends form end windings that widen at at least one axial end face (3) of the stator core (2). The axial pressing device has a plurality of winding support members (5), which are distributed circumferentially relative to the end windings on the end face of the stator core, and are axially supported on the stator core ( 2) on the end face (3) and approximately at right angles to said end winding. Furthermore, the winding support (5) is axially supported on one end face (3) of the stator core (2) by means of at least one axially acting compression spring arrangement (6) for the winding Axial compression while the readjustment device (7) is provided with an axially adjustable contact surface (8) for the compression spring device.

Description

Translated fromChinese

电机定子线圈的轴向压紧装置Axial compression device for motor stator coil

技术领域technical field

本发明涉及一种如权利要求1前序部分所述的电机定子线圈的轴向压紧装置，特别是一种用于发电站发电机的定子线圈的轴向压紧装置。The present invention relates to an axial compression device for a stator coil of a motor as described in the preamble ofclaim 1, in particular to an axial compression device for a stator coil of a power station generator.

背景技术Background technique

通常，定子(特别是发电站的发电机定子)具有芯部和具有多个绕线棒的绕组。这些绕线棒的端部至少在定子芯部的一个轴端面上穿出芯部，并且围绕彼此弯曲且彼此连接，从而这些绕线棒的端部在芯部的端面上形成端部绕组，其中随着距离所述芯部的距离增加，所述端部绕组以漏斗或圆锥形的形式变宽。为使发电机运行，这个端部绕组必须沿定子的轴向方向在拉伸应力的作用下支撑在所述芯部上，即沿轴向被支撑在所述芯部上。而且，必需从外向内、通过预张紧沿径向朝所述端部绕组施加载荷。为了能够吸收在运行过程中产生的电动动态力，对端部绕组的张紧和支撑是必需的。在一些情况下，即使所述定子正在被制造，对所述绕组或端部绕组施加张紧作用也是期望的。然而，在定子运行过程中，可能发生放置或设定过程等，并且可能对作用在绕组或端部绕组上的应力产生不利影响。Usually, a stator, in particular a generator stator of a power station, has a core and a winding with a plurality of winding bars. The ends of the winding bars pass through the core at least on one axial end face of the stator core and are bent around each other and are connected to each other so that the ends of the winding bars form end windings on the end faces of the core, wherein The end windings widen in a funnel or conical fashion with increasing distance from the core. For the generator to operate, this end winding must be supported on the core under tensile stress in the axial direction of the stator, ie supported on the core in the axial direction. Furthermore, it is necessary to apply a load radially towards the end windings from the outside to the inside by pretensioning. In order to be able to absorb the electrodynamic forces generated during operation, tensioning and support of the end windings is necessary. In some cases, it may be desirable to apply tension to the windings or end windings even as the stator is being manufactured. However, during operation of the stator, placement or setting processes etc. may occur and may adversely affect the stresses acting on the windings or end windings.

DE 103 30 523 A1公开了一种定子线圈的轴向压紧装置。所述绕组支撑件通过至少一个轴向作用的挤压弹簧装置沿轴向被支撑在芯部的一个端面上，以用于绕组的轴向压紧。各个挤压弹簧装置可支撑在支撑环上，所述支撑环靠近芯部且自身沿轴向被支撑在绕组支撑件上。靠近芯部的所述支撑环在周向上延伸，并且被封闭。靠近芯部的所述支撑环例如利用螺钉连接结构被便利且牢固地连接到每个绕组支撑件上。在支撑装置进行维修或热处理之后，所述弹簧装置有可能不再将最佳力施加在所述支撑环上，并且这会导致绕线棒的预张紧过高或过低。DE 103 30 523 A1 discloses an axial compression device for stator coils. The winding support is supported axially on an end face of the core by at least one axially acting compression spring arrangement for axial compression of the winding. Each compression spring arrangement may be supported on a support ring which is adjacent to the core and itself supported axially on the winding support. Said support ring close to the core extends circumferentially and is closed. Said support rings close to the core are conveniently and securely connected to each winding support, for example by means of a screw connection. After maintenance or heat treatment of the support device, it is possible that the spring device no longer exerts an optimum force on the support ring, and this can lead to too high or too low a pretensioning of the winding rod.

发明内容Contents of the invention

上述内容就是本发明面临的问题。如权利要求书中所限定，本发明解决了这样的问题，即能够重新调整用于定子线圈的轴向压紧装置的、作用在所述绕组上的力，所述定子特别是发电站中的发电机定子。The foregoing is the problem faced by the present invention. The invention, as defined in the claims, solves the problem of being able to readjust the forces acting on said windings of the axial compression means for the coils of a stator, in particular in a power station generator stator.

根据本发明，所述问题通过具有权利要求1所述特征的定子线圈的轴向压紧装置来解决。根据本发明的装置的有利改进方案是由从属权利要求来限定。According to the invention, this problem is solved by an axial compression device for a stator coil having the features ofclaim 1 . Advantageous developments of the device according to the invention are defined in the subclaims.

根据本发明，绕组支撑件被设置成用于绕组的轴向压紧，并且绕组支撑件通过至少一个轴向作用的挤压弹簧装置被沿轴向支撑在芯部的端面上，其中重新调整装置设置有用于挤压弹簧装置的可轴向调整的接触表面。用于所述挤压弹簧装置的可轴向调整的接触表面允许所述绕组的预张紧在维修后或热处理之后被追溯性地调整。According to the invention, the winding support is provided for axial compression of the winding, and the winding support is supported axially on the end face of the core by at least one axially acting compression spring arrangement, wherein the readjustment device An axially adjustable contact surface for the compression spring arrangement is provided. An axially adjustable contact surface for the compression spring arrangement allows the pretensioning of the winding to be adjusted retrospectively after maintenance or after heat treatment.

在本发明的一个有利改进方案中，设置有支撑环，所述支撑环靠近所述芯部，沿周向延伸，且沿轴向被支撑在所述绕组支撑件上，其中所述支撑环设有可轴向调整的接触表面。In an advantageous development of the invention, a support ring is provided which extends circumferentially close to the core and is supported axially on the winding support, wherein the support ring is provided With axially adjustable contact surfaces.

在一个优选实施例中，所述用于挤压弹簧装置的可轴向调整的接触表面是螺钉的头部或螺栓的头部。所述螺钉或螺栓可设置在所述支撑环中，其中所述头部的轴向位置可通过螺钉或螺母的旋转而被调整。In a preferred embodiment, said axially adjustable contact surface for the compression spring means is the head of a screw or the head of a bolt. The screws or bolts may be arranged in the support ring, wherein the axial position of the head can be adjusted by rotation of the screws or nuts.

根据下述描述和附图，本发明的其他优点和改进将变得明显。Other advantages and improvements of the invention will become apparent from the following description and accompanying drawings.

附图说明Description of drawings

参照示例性实施例在附图中示意性示出本发明，并且在下述文字中参照附图详细地描述本发明，其中分别示意性示出：The invention is schematically shown in the drawings with reference to exemplary embodiments and is described in detail in the following text with reference to the drawings, in which each schematically shows:

图1显示在绕组的轴向压紧装置的区域中穿出定子的简化轴向截面，所述轴向压紧装置具有根据本发明的重新调整装置；FIG. 1 shows a simplified axial section through the stator in the region of the axial compression of the windings with the readjustment device according to the invention;

图2显示图1中所示挤压弹簧装置的细节；Figure 2 shows details of the squeeze spring arrangement shown in Figure 1;

图3显示根据本发明的一个优选实施例的重新调整装置的部件；Figure 3 shows components of a readjustment device according to a preferred embodiment of the present invention;

图4显示根据本发明的重新调整装置的可轴向调整的接触表面；以及Figure 4 shows the axially adjustable contact surface of the readjustment device according to the invention; and

图5显示根据本发明的重新调整装置的后视图。Figure 5 shows a rear view of the readjustment device according to the invention.

具体实施方式Detailed ways

图1显示在绕组的轴向压紧装置1的区域中穿出定子(未图示)的截面视图。例如这样的绕组通常具有多个绕线棒(未图示)。这些绕线棒的多个端部至少在定子的芯部2的一个轴端面3上从中穿出芯部2，并且在彼此附件弯曲和彼此到连接上，以使得这些绕线棒在芯部的端面3上形成端部绕组，其中随着距所述芯部2的距离增加，所述端部绕组以漏斗的形式或成圆锥形地变宽。为了使定子进行操作，这个端部绕组必须沿定子的轴向(由双头箭头4所示)被支撑在芯部3上，也就是说具有轴向张应力或拉应力。为此目的，多个绕组支撑件5被设置，并且相对于芯部2的端面3上的端部绕组沿周向分配布置，并且在芯部2的端面3上以及在端部绕组上大致成直角地沿轴向进行支撑。芯部2的端面3包括至少一个弹簧装置6，其中绕组支撑件5通过至少一个弹簧装置6被沿轴向支撑在芯部2的端面3上。多个弹簧装置6优选设置在芯部2中，并且沿周向分配布置，以便支撑着绕组支撑件5。弹簧装置6将轴向作用力施加到绕组支撑件5，并且允许绕线棒进行预张紧。绕组支撑件5能够利用沿周向延伸的支撑环9被支撑在芯部2上。支撑环9能够例如利用螺钉连接结构而便利且牢固地连接到每个绕组支撑件5上。FIG. 1 shows a sectional view through a stator (not shown) in the region of theaxial compression device 1 of the windings. For example such a winding usually has a plurality of winding bars (not shown). The ends of these winding rods pass through thecore 2 at least on oneaxial end face 3 of thecore 2 of the stator, and are bent and connected to each other so that the winding rods are in the center of the core. An end winding is formed on theend face 3 , wherein the end winding widens in the form of a funnel or conically with increasing distance from thecore 2 . In order for the stator to operate, this end winding must be supported on thecore 3 in the axial direction of the stator (indicated by the double-headed arrow 4 ), that is to say with axial or tensile stress. For this purpose, a plurality of winding supports 5 are provided and distributed in the circumferential direction with respect to the end windings on theend face 3 of thecore 2 and are approximately formed on theend face 3 of thecore 2 and on the end windings. Supported axially at right angles. Theend face 3 of thecore 2 comprises at least onespring device 6 , wherein the winding support 5 is axially supported on theend face 3 of thecore 2 by means of the at least onespring device 6 . A plurality of spring means 6 are preferably arranged in thecore 2 and distributed in the circumferential direction in order to support the winding support 5 . The spring means 6 apply an axial force to the winding support 5 and allow pretensioning of the winding bar. The winding support 5 can be supported on thecore 2 by means of a circumferentially extending support ring 9 . A support ring 9 can be conveniently and securely connected to each winding support 5 , for example by means of a screw connection.

根据本发明，还设置有重新调整装置7，所述重新调整装置7具有用于挤压弹簧装置6的可轴向调整的接触表面8。如图1所示，重新调整装置7能够布置在支撑环9上。然而，重新调整装置7(其具有用于挤压弹簧装置6的接触表面8)还可以布置在绕组支撑件5自身上。According to the invention, areadjustment device 7 is also provided, which has an axiallyadjustable contact surface 8 for thecompression spring device 6 . As shown in FIG. 1 , thereadjustment device 7 can be arranged on the support ring 9 . However, thereadjustment device 7 , which has thecontact surface 8 for pressing thespring device 6 , can also be arranged on the winding support 5 itself.

图2示意性地示出位于芯部2中的挤压弹簧装置6的基本结构。图2中可以看见杯形弹簧组16，其向绕组支撑件5施加预张力。挤压弹簧装置6的结构和操作方法对本领域技术人员而言是熟悉的，不需要对这一点具体说明。所述附图显示挤压弹簧装置6上的封盖盘14。重新调整装置7的接触表面8直接支撑在这个封盖盘14的接触表面15上。在最简单的情况下，挤压弹簧装置6和重新调整装置7的相互作用接触表面8和15可以是平面的。根据本发明的优选实施例，封盖盘14装配有凹形接触表面15，以便与重新调整装置7上的凸形接触表面8相互作用。FIG. 2 schematically shows the basic structure of thecompression spring arrangement 6 in thecore 2 . Acup spring set 16 can be seen in FIG. 2 , which pretensions the winding support 5 . The structure and method of operation of thesqueeze spring device 6 are familiar to those skilled in the art, and a detailed description of this point is not required. Said figure shows thecapping disk 14 on thecompression spring arrangement 6 . Thecontact surface 8 of thereadjustment device 7 bears directly on thecontact surface 15 of thislidding disc 14 . In the simplest case, theinteraction contact surfaces 8 and 15 of the compression spring means 6 and the readjustment means 7 can be planar. According to a preferred embodiment of the invention, thecapping disc 14 is equipped with aconcave contact surface 15 for interacting with aconvex contact surface 8 on thereadjustment device 7 .

图3是重新调整装置7的一个优选实施例。重新调整装置7显示其形式为螺钉或螺栓10。螺纹杆11和头部12之间的连接可以是刚性连接和铰接(或枢接)的(例如在具有铰接脚的情况下)。头部或接触板12用作用于弹簧装置6的封盖盘14的一个接触表面8，并且被定位成与弹簧装置6基本上对齐。接触表面8的凸型形状连同互补接触表面15的凹型形状具有自居中的效果。这不仅使组装简化，而且降低了在瞬间操作状态下发生侧向移位的风险。弹簧装置6的优选安装位置显示于图4和图5。这些附图显示螺钉或螺栓10被安装在支撑环9中。为此，支撑环9能够设置有带内螺纹的孔口。FIG. 3 is a preferred embodiment of thereadjustment device 7 . The readjustment means 7 are shown in the form of screws orbolts 10 . The connection between the threaded rod 11 and the head 12 may be rigid and hinged (or pivoted) (for example with hinged feet). The head or contact plate 12 serves as onecontact surface 8 for thecapping disc 14 of the spring means 6 and is positioned substantially aligned with thespring means 6 . The convex shape of thecontact surface 8 together with the concave shape of thecomplementary contact surface 15 has a self-centering effect. This not only simplifies assembly, but also reduces the risk of lateral displacement during momentary operating conditions. A preferred installation position of thespring device 6 is shown in FIGS. 4 and 5 . These figures show that screws orbolts 10 are installed in support ring 9 . To this end, the support ring 9 can be provided with an internally threaded orifice.

在进行热处理前，螺钉和螺栓10被拧紧到支撑环9内，直到接触表面8完全与支撑环9的表面相齐平。在进行维修或热处理后，接触表面8的轴向高度能够通过旋转螺钉或螺栓10进行调整，以便通过这种方式向绕组施加所需的预应力。螺母13能够用于紧固螺栓10以防其旋转，并且以本身已知的方式(例如利用带齿的垫圈)进行紧固以防止发生意外地变松。Before heat treatment, the screws andbolts 10 are tightened into the support ring 9 until thecontact surface 8 is completely flush with the surface of the support ring 9 . After maintenance or heat treatment, the axial height of thecontact surface 8 can be adjusted by turning the screw orbolt 10 in order to apply the required prestressing force to the winding in this way. Anut 13 can be used to secure thebolt 10 against its rotation, and in a manner known per se (for example with a toothed washer) against unintentional loosening.

可替代地，通过旋转被布置在支撑环9和绕组支撑件5之间的螺母13，能够调整所述接触表面8的轴向高度。Alternatively, the axial height of saidcontact surface 8 can be adjusted by turning anut 13 arranged between the support ring 9 and the winding support 5 .

支撑环9可以被封闭，并且如图1中所示可以具有抵靠在芯部2的径向外表面上的内周表面。便利地，多个重新调整装置7精确地分配布置在支撑环9的周边上，使得它们被定位成与挤压弹簧装置6直接相对。The support ring 9 may be closed and, as shown in FIG. 1 , may have an inner peripheral surface which rests on the radially outer surface of thecore 2 . Conveniently, a plurality of readjustment means 7 are arranged precisely distributed on the periphery of the support ring 9 such that they are positioned directly opposite the compression spring means 6 .

根据本发明的示例性实施例的上述描述仅旨在用于示例性目的，而非用于限制本发明的目的。特别的，多个优选示例性实施例，对本领域技术人员显而易见的是，在不偏离本发明的构思和保护范围的前提下，能够对其在形式和细节方面做出各种变化和修改。本发明的公开内容因此不应当认为是限制性的。相反，本发明的公开内容旨在说明所附权利要求书中所述的本发明的保护范围。The above descriptions according to the exemplary embodiments of the present invention are intended for illustrative purposes only, not for the purpose of limiting the present invention. In particular, it is obvious to those skilled in the art that various changes and modifications can be made in form and details of the preferred exemplary embodiments without departing from the concept and protection scope of the present invention. The disclosure of the invention should therefore not be considered as limiting. Rather, the disclosure of the invention is intended to be illustrative of the scope of the invention as described in the appended claims.

附图标记列表List of reference signs

1张紧装置1 tensioning device

2芯部2 cores

3芯部的端面3 end face of the core

4轴线方向(轴向)4 axis direction (axial)

5绕组支撑件5 winding supports

6挤压弹簧装置6 squeeze spring device

7重新调整装置7Readjust the device

8接触表面8 contact surfaces

9支撑环9 support ring

10螺栓10 bolts

11螺纹杆11 threaded rod

12头部12 heads

13螺母13 nuts

14封盖盘14 capping trays

15接触表面15 contact surface

16杯形弹簧组16 Cup Spring Sets

Claims (8)

Translated fromChinese

1.一种电机定子绕组的轴向压紧装置，所述电机特别是发电站的发电机，其中所述绕组具有多个绕线棒，其端部沿轴向穿出定子芯部(2)，并且其端部形成在定子芯部(2)的至少一个轴向端面(3)处变宽的端部绕组；所述轴向压紧装置具有多个绕组支撑件(5)，其相对于所述定子芯部的轴向端面上的端部绕组沿周分散地布置，沿轴向被支撑在所述定子芯部(2)的端面(3)上，并且与所述端部绕组大致成直角；并且，所述绕组支撑件(5)通过至少一个轴向作用的挤压弹簧装置(6)沿轴向被支撑在定子芯部(2)的一个端面(3)上，以对绕组进行轴向压紧，其特征在于，1. An axial compression device for a stator winding of an electric motor, in particular a generator of a power station, wherein the winding has a plurality of winding bars, the ends of which pass axially out of the stator core (2) , and its ends form end windings widened at at least one axial end face (3) of the stator core (2); The end windings on the axial end surface of the stator core are arranged dispersedly along the circumference, are supported on the end surface (3) of the stator core (2) in the axial direction, and are approximately in the same shape as the end windings and, said winding support (5) is axially supported on one end face (3) of the stator core (2) by means of at least one axially acting compression spring device (6) for winding Axial compression, characterized in that,一方面，所述挤压弹簧装置(6)被支撑在所述定子芯部(2)上；另一方面，所述挤压弹簧装置(6)被支撑在与所述绕组支撑件(5)相连接的重新调整装置(7)的可轴向调整的接触表面(8)上。On the one hand, said compression spring device (6) is supported on said stator core (2); on the other hand, said compression spring device (6) is supported on said winding support (5) On the axially adjustable contact surface (8) of the associated readjustment device (7).2.根据权利要求1所述的轴向压紧装置，其特征在于，2. The axial pressing device according to claim 1, characterized in that,所述轴向压紧装置还设置有靠近所述定子芯部的支撑环(9)，所述支撑环(9)沿周向延伸并且沿轴向被支撑在所述绕组支撑件(5)上，同时所述重新调整装置(7)被布置在所述支撑环(9)中。The axial compression device is also provided with a support ring (9) close to the stator core, the support ring (9) extending in the circumferential direction and supported on the winding support (5) in the axial direction , while the readjustment device (7) is arranged in the support ring (9).3.根据权利要求1所述的轴向压紧装置，其特征在于，3. The axial pressing device according to claim 1, characterized in that,所述重新调整装置(7)是螺钉或螺栓(10)，其具有螺纹杆(11)和头部(12)，所述螺钉或螺栓(10)的螺纹杆(11)连接到所述支撑环(9)上，并且所述接触表面(8)形成在所述头部(12)上。The readjustment means (7) is a screw or bolt (10) having a threaded shaft (11) and a head (12), the threaded shaft (11) of the screw or bolt (10) being connected to the support ring (9) and said contact surface (8) is formed on said head (12).4.根据权利要求3所述的轴向压紧装置，其特征在于，4. The axial pressing device according to claim 3, characterized in that,所述螺钉或螺栓(10)的头部(12)以铰接的方式被连接到所述螺纹杆(11)上。The head (12) of the screw or bolt (10) is hingedly connected to the threaded rod (11).5.根据权利要求1所述的轴向压紧装置，其特征在于，5. The axial pressing device according to claim 1, characterized in that,所述挤压弹簧装置(6)具有封盖盘(14)，所述封盖盘(14)的接触表面(15)与所述重新调整装置(7)的接触表面(8)相互作用。The squeeze spring device (6) has a capping disc (14), the contact surface (15) of which interacts with the contact surface (8) of the readjustment device (7).6.根据前述权利要求中的任一所述的轴向压紧装置，其特征在于，6. Axial compression device according to any one of the preceding claims, characterized in that,所述挤压弹簧装置(6)的接触表面(15)是凹型的，且所述重新调整装置(7)的接触表面(8)是凸型的；或者，反之亦然。The contact surface (15) of the compression spring means (6) is concave and the contact surface (8) of the readjustment means (7) is convex; or vice versa.7.根据权利要求1所述的轴向压紧装置，其特征在于，7. The axial pressing device according to claim 1, characterized in that,当所述螺钉或螺栓(10)位于完全拧入位置时，用作接触表面(8)的螺钉或螺栓(10)的头部(12)是与所述支撑环(9)或定子芯部(2)的表面基本上齐平。When said screw or bolt (10) is in the fully screwed-in position, the head (12) of the screw or bolt (10) serving as a contact surface (8) is in contact with said support ring (9) or stator core ( 2) is substantially flush with the surface.8.根据权利要求1所述的轴向压紧装置，其特征在于，8. The axial pressing device according to claim 1, characterized in that,靠近定子芯部的所述支撑环(9)是封闭的，并且牢固地连接到每个绕组支撑件(5)上。Said support rings (9) close to the stator core are closed and firmly connected to each winding support (5).

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